Tin niobate nanosheet, preparation method thereof and application of tin niobate in preparation of lithium battery

A nanosheet, lithium ion battery technology, applied in nanotechnology, nanotechnology, secondary batteries and other directions, can solve problems such as short circuit and safety hazards of lithium dendrite batteries, and achieve the effect of low cost and easy operation

Inactive Publication Date: 2019-01-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the anode material of commercialized lithium-ion batteries is mainly graphite, but the lithium intercalation potential of graphite is close to that of metal lithium, and it is easy to form lithium dendrites during charging and discharging, causing short circuit of the battery, thus causing certain safety hazards

Method used

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  • Tin niobate nanosheet, preparation method thereof and application of tin niobate in preparation of lithium battery
  • Tin niobate nanosheet, preparation method thereof and application of tin niobate in preparation of lithium battery
  • Tin niobate nanosheet, preparation method thereof and application of tin niobate in preparation of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] SnNb 2 o 6 Preparation method of nanosheets:

[0027] 1) Weigh / measure 0.7g of K 8 Nb 6 o 19 , 0.4g of SnCl 2 2H 2 O and 30mL mass fraction are 30% ethanol aqueous solution, are placed in the reactor that liner is polytetrafluoroethylene, adopt magnetic stirring to fully stir and mix uniformly, make mixed solution;

[0028] 2) Put the reaction kettle into an oven, and the mixed solution was hydrothermally reacted at 120°C for 2 hours, and the substance generated by the hydrothermal reaction was naturally cooled to room temperature, and the cooled substance was centrifuged, and washed several times with deionized water and absolute ethanol Then put it into a vacuum drying oven and dry at 30°C for 1 hour to obtain SnNb 2 o 6 Nanosheets.

[0029] Using the obtained SnNb 2 o 6 The method for making the negative electrode of lithium-ion battery with nanosheets:

[0030] The resulting SnNb 2 o 6 The nanosheets, sodium carboxymethyl cellulose and acetylene black ...

Embodiment 2

[0032] SnNb 2 o 6 Preparation method of nanosheets:

[0033] 1) Weigh / measure 0.7g of K 8 Nb 6 o 19 , 0.6g of SnCl 2 2H 2 0 and 40mL mass fraction are 40% ethanol aqueous solution, be placed in the reactor that liner is polytetrafluoroethylene, adopt magnetic stirring to fully stir and mix uniformly, make mixed solution;

[0034] 2) Put the reaction kettle into an oven, and the mixed solution is hydrothermally reacted at 160°C for 8 hours, the substance generated by the hydrothermal reaction is naturally cooled to room temperature, the cooled substance is centrifuged, and washed several times with deionized water and absolute ethanol Then put it into a vacuum drying oven and dry at 50°C for 1 hour to obtain SnNb 2 o 6 Nanosheets.

[0035] Using the obtained SnNb 2 o 6 The method for making the negative electrode of lithium-ion battery with nanosheets:

[0036] The resulting SnNb 2 o 6 The nanosheets, sodium carboxymethyl cellulose and acetylene black are mixed an...

Embodiment 3

[0038] SnNb 2 o 6 Preparation method of nanosheets:

[0039] 1) Weigh / measure 0.7g of K 8 Nb 6 o 19 , 1g of SnCl 2 2H 2 O and 50mL mass fraction are 50% ethanol aqueous solution, are placed in the reactor that liner is polytetrafluoroethylene, adopt magnetic stirring to fully stir and mix uniformly, make mixed solution;

[0040] 2) Put the reaction kettle into an oven, and the mixed solution was hydrothermally reacted at 200°C for 12 hours, the substance generated by the hydrothermal reaction was naturally cooled to room temperature, the cooled substance was centrifuged, and washed several times with deionized water and absolute ethanol Then put it into a vacuum drying oven and dry it at 60°C for 1 hour to obtain SnNb 2 o 6 Nanosheets.

[0041] Using the obtained SnNb 2 o 6The method for making the negative electrode of lithium-ion battery with nanosheets:

[0042] The resulting SnNb 2 o 6 Nanosheets, sodium carboxymethyl cellulose and acetylene black are mixed a...

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Abstract

The invention discloses a SnNb2O6 nanosheet, a preparation method thereof and application of the SnNb2O6 nanosheet in preparation of a lithium battery, and belongs to the technical field of preparation of materials and lithium ion battery materials. The preparation method comprises the following steps: carrying out hydrothermal reaction on a certain amount of K8Nb6O19, a certain amount of SnCl2.2H2O and an ethanol aqueous solution, and cooling, centrifuging, washing and drying to obtain the SnNb2O6 nanosheet; and mixing and grinding a certain amount of the SnNb2O6 nanosheet, sodium carboxymethylcellulose and acetylene black, adding water and preparing into mixed slurry, and uniformly coating a copper plate with the mixed slurry as an anode of a lithium ion battery. The preparation method of the SnNb2O6 nanosheet disclosed by the invention has the advantages of simplicity and convenience in operation, low cost and the like. The SnNb2O6 nanosheet prepared by the method is high in purityand good in crystalline form, and a large number of SnNb2O6 nanosheets can be synthesized. The lithium ion battery which takes the SnNb2O6 nanosheet as the anode has high specific capacity and good cycle performance and rate capability.

Description

technical field [0001] The invention belongs to the technical field of material preparation and lithium ion battery materials, in particular to a tin niobate (SnNb 2 o 6 ) nanosheet and its preparation method and its application in the preparation of lithium battery. Background technique [0002] Due to the advantages of high specific capacity, high voltage, long cycle life, no memory effect and low pollution, lithium-ion batteries have been widely used in mobile electronic devices, small portable power devices and defense industries. Electrode materials are an important part of lithium-ion batteries and a key factor determining the performance of lithium-ion batteries. At present, the anode material of commercialized lithium-ion batteries is mainly graphite, but the lithium intercalation potential of graphite is close to that of metal lithium, and it is easy to form lithium dendrites during charging and discharging, causing short circuit of the battery, thus causing certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00H01M4/48H01M10/0525B82Y30/00
CPCB82Y30/00C01G33/00C01P2002/72C01P2004/03C01P2004/04C01P2004/20C01P2006/40H01M4/48H01M10/0525Y02E60/10
Inventor 孔新刚张家瑞冯旗黄剑锋殷立雄欧阳海波
Owner SHAANXI UNIV OF SCI & TECH
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